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(No Model.) 5 Sheets-Sheet 1.

G. G; WAGNER. ELECTRIC ARC LAMP.-

No. 514,139. Patented Feb. 6,1894.

(No Model.)

5 Sheets-Sheet 2. G. G. WAGNER.

ELECTRIC ARC LAMP.

Patented Feb. 6, 1894.

(No Model.) 5 SheetsSh.eet 3. G. G. WAGNER.

ELECTRIC ARC LAMP,

Patented Pebf6f1894.

CE 6 a I in: nAmmAl. Lrmoaumm colnmv,

(No Model.) 5 Sheets-Sheet 4. 4 G. G. WAGNER.

ELECTRIC ARC LAMP.

Patented Feb. 6, 1894.

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UNITED STATES PATENT OFFICE.

GUSTAVUS G. lVAGNER, OF NElV YORK, N. Y., ASSIGNOR TO THE INTERIORCONDUIT AND INSULATION COMPANY, OF SAME PLACE.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 514,139, dated February6, 1894.

Application filed November 15, 1892. Serial No. 452,091. (No model.)

To all whom it may concern.-

Be it known that I, Gusrnvos G. WAGNER, a citizen of the United Statesof America, residing at New York, in the county of New York and State ofNew York, have invented certain new and useful Improvements in AreLamps, of which the following is a specification.

My invention relates to improvements in that type of arc lamps in whichthe electrodes consist of material made in the shape or conformation ofsectors or parts of a circle, and are fed horizontally toward each otherthrough the agency of electromagnetic controlling apparatus.

My invention has for its objects, first, the construction of a lamp ofthis type in which the parts shall be compactly arranged within a smallspace, and, second, the adaptation of :0 an automatic out out apparatusto such a lamp and in such manner that the carbons may be automaticallycutout under abnormal conditions of current, and, third, to provide sucha lamp with the several details of construction and arrangementof partshereinafter described, all of the novel features of which areparticularly pointed out in the claims at the end of this specification.

For a full and clear understanding of the 0 invention reference is hadto the accompan ying drawings, in which Figure 1 is a horizontalsectional view taken through Fig. 3 on the broken line 11 and as seenlooking in the direction of the arrows.

Fig. 2 is a similar View taken through the same figure on the brokenline 22. Fig. 3 is a vertical sectional View taken through Fig. l on theline 33 and as seen looking in the direction of the arrows from left toright. Fig.

4 is a vertical plan view as seen looking at Fig. 3 from the bottomtoward the top of the drawings. Fig. 5 is a detail View illustrating theclamp attachments for the carbon electrodes. Fig. 6 is also a detailView illustrat- 4 5 ing the automatic cutout apparatus, and Fig.

7 is a diagrammatic view illustrating the circuits of the lamp. Figs. 8and 9 are sectional 7 views taken respectively on the lines lel and5--5, Fig. l.

I Referring now to the drawings in detail in all of which like lettersof reference represent like parts wherever used, 0 constitutes the baseof the lamp adapted to support the operative parts and to act also as areflector for throwing the rays of the lamp downward.

B constitutes the main support or arm for sustaining the mechanism ofthe lamp and is preferably cast of the conformation shown in Fig. 3 soas to have journal bearings for an upright shaft S in its upper andlower ends, and also for clock mechanism, consisting of a train of gearwheels G, G, G dzc, the main gear wheel G being splined directly on theupper end of the upright shaft S and connected to the body or frame ofthe lamp bya main or driving spring S which is adapted to cause theshaft S to rot-ate and carry with it the carbon supporting arm A in thedirection of the arrow shown in Fig. 7.

A is a fixed horizontal carbon supporting 7o arm and D, D are the carbonelectrodes of flat disk like shape securely held in position upon thearms A and A by clamps II and set screws T,ff being guide screws fittingin grooves in the upper face of the arms A and 7 A. The rigid arm A itwill be observed is thoroughly insulated from the body or frame of thelamp B while the movable arm A is in direct electrical contacttherewith.

M and M are solenoid coils, the former of comparatively low resistance,and the latter of high resistance, said coils being so wound as tooppose each other in their pull upon the magnet core E which ispivotally secured in the upper portion of the lamp frame so as to rockback and forth.

An examination of Fig. 7 will clearly disclose the nature of thewindings of the two coils, the winding m of the low resistance coilbeing connected to the conductor 10 at its opposite ends, and thewinding m beneath the winding hi being differential or the reverse ofthe coil m said coil m being con nected by the conductor w with the coilm of the high resistance solenoid M.

The train of gear wheels G, G, G &c., ends in an escapement 6 adapted toimpel an escapement pallet 19 borne by an upright shaft which carries anarm a with a downward extension adapted to make mechanical contact xoowith a notch in the outer end of the adjustable lever F so that when thesolenoid core able lever F, said lever having a spring which permits thefree or outward end to be advanced as desired for the purpose oflengthening the arc to any desired length.

F is a pivoted cut out lever having a spring 75 attached to its upperside and to the frame of the lamp, the function of said spring being tolift the lever into contact with the under surface of the metalliccontact plate at when the switch actuating pin Z is carried sufficientlyfar to the right (see Fig. 7) to clear it from the outer end of thelever.

S is an operating switch adapted to shunt the lamp when it is sodesired. Attached to this switch S is an arm m (see Fig. 2) the free endof which comes in contact with a pin on the lower side of the magnetcore E so that when turned into the position shown in dotted lines inthat figure the arm m will force the solenoid core E to the right andrupture the short circuit between the cut out spring or arm F and thecontact plate n.

The operation of the apparatus is as follows: Suppose the carbons to benormally in contact with each other and the switch S to be closed. (SeeFig. 7.) In the position indicated in Fig. 2 with the full sized carbonsin place, the driving spring S has been put under tension in carryingthe arm in the reverse direction of the arrow, and the two carbons D andD normally rest against each other. Suppose then the switch S be closedor in the position shown in dotted lines in Fig. 2; this short circuitsthe lamp as will be seen on examination of Fig. 7 as follows: Thecurrent entering by the conductor w on the. left hand binding post 12,switch S conductor tu binding post b conductor w, binding post 6' toline, but the act of turning the switch S just named and illustrated indotted lines in Fig. 2 causes the arm m carried by the same switch toforce the solenoid core E to the right, thereby causing the pin Z andits insulating contact point -v to ride over the curved end of thespring F thereby rupturing the circuit between the lower extended lug ofthe spring F seen on the right in Fig. 2 with the upper contact plate nseen in Fig. 7, so that the shunt path to connected to the lever F isnow ruptured between the binding post I) and the juncture of the twoconductors w w. The switch S is now turned into the position shown infull lines in Fig. 2 and also in Fig. 7. The current is thereforeruptured through the shunt 'w and takes the following path: from thebinding post I) to the conductor w to the rotary shaft S through the armA, carbon D, carbon D, and arm A. The upper screw which holds the arm Ato standard B, conductor w, low resistance coils m of magnet M andthence by conductorw to binding post b binding post b out to line. Atthe same time a derived current path of high resistance is formed at thejunctures of the conductors w and w on the left passing by the coil m ofthe solenoid M, conductor to, differential coil m conductor w, where itjoins the other or main current and passes out to line. The coil m ofthe solenoid M however has sulficient influence upon the solenoid core Eto rotate it from left to right as seen in Figs. 1

and 2 and from right to left as seen in Fig. 7,

thus establishing the are between the two carbon electrodes D and D.Consequently they burn away and are allowed to be fed forward by themain spring M as they thus burn away, until the solenoid core is checkedin its motion to the right by the escapement pallet and escapement itcoming into contact with the notch in the end of the lever F. After atime however the difierential coil m and the opposing coil m ofthe highresistance solenoid M overpower the magnet M and draw the core E in areverse direction, thus releasing the escapement and allowing the carbonA to be fed forward under the influence of the clock mechanism G, G,&c., and

its propelling spring S. This continues until the forward feed ischecked by the escapement lever hand the notch on the end of the lever Fas before. Should an abnormal current at any time pass through the highresistauce coil M owing to a rupture of the carbons or any unforeseenaccident it will turn the solenoid core E sufiiciently far to the leftfor the pin Z to ride over the upwardly curved extension of the lever F,thus allowing the lug on the outer end of this lever to come intoelectrical contact with the upper yielding spring n therebyautomatically establishing a shunt circuit around the lamp which cannotbe broken until an attendant reaches the lamp and manipulates the switchS as already.

described.

I do not limit myself to the specific details of construction hereindescribed and shown as many of the features of my improvement may bedeparted from in general terms and still come within the scope of myclaims hereinafter made.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is-

1. An arc lamp having a fixed and a movable carbon holder, the latterattached to a vertical shaft operatively connected to a train of gearingin combination with a singlesolenoid core extending through two solenoidcoils, one of which is in circuit with the carbons and the other in aby-path or shunt circuit and an escapement carried by the solenoid coreadapted to come into mechanical contact with a stop on the frame of thelamp, substantially as described. Y

2.' An arc lamp having a fixed and a mov able carbon holder, the latterattached to a vertical shaft, a train of gearing for feeding the movablecarbon forward as it burns away;

an escapement for regulating the length of the arc and an automaticlectro-magnetic cut out device in combination with a shunting switchhaving an arm adapted to break-the shunt path formed automatically,establish a new shunt path and put the lamp in condition to work againwhen the switch is opened, substantially as described.

3. In an arc lamp carbon feeding mechanism for feeding the carbonstogether as they burn away in combination with a single s0- lenoid coreoperatively connected to an escapement for regulating the length of theare, said core being surrounded by three coils as follows, one lowresistance coil in the arc circuit and two high resistance coils inseries with each other and in a permanently closed shunt, one of saidcoils being reversely wound to the main coil and located beneath it,substautially as described.

4. An arc lamp having an electromagnetic cut out which acts to shunt thelamp for abnormal currents in combination with a hand switch havingmeans for rupturing the shunt established automatically and circuitconnections for establishing a second or independent shunt and at thesame time placing the lamp in condition to work when the switch is againmanipulated.

5. In an arc lamp an electro-magnetic cut out which shunts the lamp forabnormal currents, a hand switch having mechanical connections forrupturing the shunt thus established and placing the lamp in conditionto work and electrical connections whereby when the first shunt isruptured a new shunt is made and the lamp again rendered operative whenthe last named shunt is broken.

6. An arc lamp having a pair of carbon holders one of which is fixed andthe other movable and attached to a vertical rotary shaft operativelyconnected to a train of gearing, in combination with a pair of solenoidshaving a curved core adapted to move in a plane parallel with thecarbons and an escapement carried by the core adapted to check the trainof gear and regulate the length of the are, substantially as shown anddescribed.

GUSTAVUS G. WAGNER.

Witnesses:

O. J. KINTNER, M. M. Ronnvson.

